DAX, a town of south-western France, capital of an arrondisse ment in the department of Landes, 92 m. S.S.W. of Bordeaux, on the Southern railway between that city and Bayonne. Pop. (1931), 9,87o. It lies on the left bank of the Adour, and its suburb, Le Sablar, on the right. Its ancient Gallo-Roman fortifications are now a promenade. Dax (Aquae Tarbellicae, Aquae Augustae, later D'Acqs) was the capital of the Tarbelli in Roman times, when its waters were already famous. In the Ilth century its viscounty passed to the viscounts of Bearn, and in 1177 was an nexed by Richard Coeur de Lion to Gascony. The bishopric, founded in the 3rd century, was in i8oi attached to that of Aire. The church of Notre-Dame, once a cathedral, was rebuilt from 1656 to 1719, but still preserves a sacristy, a porch and a fine sculptured doorway of the i3th century. The church of St. Paul les-Dax, mainly i 5th century, has a Romanesque apse with curious bas-reliefs. Dax, well known as a winter resort, has thermal waters and mud-baths (the deposit of the Adour). The principal of numerous bathing establishments are the Grands Thermes, the Bains Sales, adjoining a casino, and the Baignots, which fringe the Adour and are surrounded by gardens. Dax has a subpre fecture and tribunals of first instance and of commerce. Com merce is chiefly in the pine wood, resin and cork of the Landes, and in mules, cattle and horses.